Base for a lighting fixture



FIG. 1 is a perspective view of the base for a lighting fixture of the present design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The dashed lines shown in the figures illustrating portions of the lighting fixture form no part of the claimed design. 

CLAIM I claim an ornamental design for a base for a lighting fixture, as shown and described. 